Messages in this thread | | | From | "Michael Kerrisk" <> | Subject | Re: Strange NOTAIL inheritance behaviour in Reiserfs 3.6 | Date | Thu, 24 Jun 2004 18:11:18 +0200 |
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> On Thu, Jun 24, 2004 at 04:27:44PM +0200, Michael Kerrisk wrote: > > > > > > MK> # mount -t reiserfs /dev/hda12 /testfs > > > Does it work as expected if you add "-o attrs" to the mount command? > > Yes! Thanks. However, it is a little unfortunate that if one fails > > to use this option, then: > > 1. "chattr +t" (and I suppose underlying ioctl()s) can still be used to > > set this attribute on a directory, without any error resulting. > > It would be better if an error is reported. > > Well, initial idea was to allow people to at least reset attributes > in case of operationg with disabled attributes processing.
This seems to a bad idea. Why should I be able to reset attributes if the FS is mounted without "-o attrs"? That seems to thwart the point of excluding "-o attrs". In any case, how about at least an error when one tries to *set* attributes when "-o attrs" was specified?
> > 2. The attribute is then inherited by files created in that directory, > > but has no effect. > > Yes, attribute inheritance is working. The only part that is disabled > by default is copying from fs-specific attribute storage to actual VFS inode > attributes. > > > 3. A later explicit "chattr + t" on the files themselves DOES result in > > unpacking of the tails. Why? > > There is a check in attributes setting code (and attributes setting/cleaning > is enabled), that tests if NOTAIL attribute is set, that calls tails > unpacking if so. Next time you write to that file it will be packed back > (if possible).
Strange ;-).
> I agree that all of this is not very intuitive, though.
Okay -- thanks Oleg.
Cheers,
Michael
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